Typewriting machine



5, 1939. 1.. c. MYERS TYFEWRITING MACHINE Filed Dec. 30, 1937 l INVENTQR Lewbs CUE/gem ATTORNEYS Patented Aug. 15, 1939 TYPEWBITING MACHINE Lewis 6. Myers, Freeport, N. Y., assignor to Royal Typewriter Company, Inc., New York, N. Y., a corporation of New York Application December 30 1937, Serial No: 182,591

12 Claim.

This invention relates to new and useful improvements in typewriting machines generally, although more particularly to improvements in the means for adjusting the tensions of the type action springs and for indicating the amount of such adjustment, as shown in the patent to Myers 1,983,482, December 4, 1934. Reference also is made to the copending application of Anthony Utz, Serial No. 182,590, filed December 30, 1937.

In the Myers patent, a manually operable thrust screw is mounted in the rear of the machine frame for adjusting the anchor plate to which all of the type action springs are connected, and an indicator which is operable by the anchor plate is located for observation at the side of the machine frame. The full force of the type action springs is directed against the manually operable aifiusting screw and consequently these springs oiier considerable resistance to the thrust movement of the screw. Furthermore, by reason of the adjusting screw being located in rear of the machine, it is decidedly unhandy for the operator to effect an adjustment thereof and simultaneously observe the indicator which is at the side'of the machine.

Among the several objects of the present invention are to provide a manually operable element in close proximity to the indicator whereby the operator may-readily adjust the combined tension of the springs and simultaneously observe the effect of such adjustment, and to provide a manually operable screw which is freely adjustable for varying the combined tension of said springs.

With these and other objects in view which will more fully appear, the nature of the invention will be more clearly understood by following the description, the appended claims, and the several views illustrated in the accompanying drawing.

In the drawing:

Figure 1 is a vertical section taken through a typewrlting machine and showing the application of my invention,

Figure 2 is a horizontal section taken on the line 2-2 of Figure 1,

Figure 3 is a horizontal section taken on the line 3-3 of Figure 1,

Figure 4 is a horizontal section taken on the line 44' of Figure 1,

Figure 5 is a detail vertical section taken on the line 55 of Figure 2,

Figure 6 is a detail elevation showing the indicator and the operating element therefor,

Figure 7 is an enlarged fragmentary view of the indicator dial. and

Figure 8 is a detail sectional view showing a modified arrangement wherein the dial is located wholly within the main frame.

Like reference numerals designate corresponding parts throughout the several figures of th drawing.

Referring to the accompanying drawing, I have illustrated my invention as being applied to a Royal Standard typewriting machine, although it will be understood that the invention may be applied equally well to other known machines.

The typewrlting machine includes a main frame A having a rear wall 5 and side walls 6, 6". Located within the main frame is a plurality of type actions each of which includes a type bar I pivoted at 8 on a segment 9, a key lever I0 pivoted at H on a cross bar l2 which is secured to the side plates of the frame, a front link 13 which is pivoted at It to a cross bar It, a link [5 which is pivotally connected to the key lever l0 and to the link i3, an intermediate lever l6 which is pivoted at l1 to the cross bar l2, a link I! pivotally connected to the front link I3 and the intermediate lever, and a link l9 which is pivotally connected to the intermediate lever i6 and to the heel of a type bar I. A vertically disposed anchor plate 20 is journaled at its lower end on spaced horizontal pivots 2i mounted in bearing lugs 22 which are rigidly connected to and extend forwardly from the rear wall 5 of the main frame, there being only one pivot and one lug shown. The upper end of the anchor plate 20 is provided with a forwardly extending flange 23 having a plurality of openings 24, there being one opening for each type action. A universal bar 25 is mounted in the usual manner on the rear wall 5 of the frame and is-connected by links 26 to the intermediate levers IS. A coil spring 27 is disposed around each link 26 and has its forward end connected thereto and its rearend engaged in the corresponding opening 24 of the anchor plate 20. Normally the springs 21 exert a rearward pull on the intermediate levers It to thereby normally retain the key levers i0 and the type bars in their rest positions.

The right hand side wall 6 of the main frame is provided with an elongated opening 28 and removably mounted in said opening is a closure plate 29 which is preferably formed of metal, although any othermaterial may be employed if desired. The plate 29 is provided with an elongated horizontal opening 30, and a pointer 3| which is preferably integral with the plate, propreferably below combined tension of the springs 21.

jects downwardly into the opening from the center of the upper edge of said opening. Disposed in close proximity to the opening 99, and

the same, is a circular opening 92. a

The anchor plate 29 is adjustable to and fro of the machine in order to vary collectively the tensions of the springs 21 and thereby vary the touch of the type actions. For this purpose a bracket 99 is rigidlymounted on the cross bar I! adjacent the openings 99, 92 of the closure plate 29. This bracket includes spaced upper and lower plates 94 and 99 and journaled in these plates is a vertically disposed indicator shaft 99 having its upper end projecting above the upper plate 94. An indicator dial 91 of disc configuration is fixed to the upper end of the shaft 96 and projects slightly through the opening 90 of the closure plate 29. The disc is provided with a downwardly inclined beveled periphery 99 having a scale 99 thereon which is visible exteriorly of the plate 29 and is located in position for cooperation with the pointer 9i.

Fixed to the indicator shaft 96 intermediate the upper and lower plates of the bracket 99, is a worm wheel 49 which is threadably engaged with a manually operable horizontal worm shaft II which is joumaled in said bracket. One end of the shaft ll projects outwardly through the opening 92 and is provided with a finger knob 42.

A link 49 is pivotally connected at its rear end as at N to a bracket arm fixed to the upper end of the anchor plate 29. The front end of the link 49 is provided with a laterally extending arm 46 which overlies the indicator disc 91 and is pivotally connected thereto by means of an eccentrically positioned shoulder screw or pin 41 mounted on said disc.

The worm wheel 40 is provided with spaced shoulder steps l9, 99 adapted to respectively cooperate with a stop pin 49 fixed on the bracket 99 to thereby limit the rotations of the manually operable worm shaft ll and also to maintain the scale 99 in cooperative relation with the pointer 9|.

It will, therefore, be seen that when the worm shaft ll is actuated by the operator, the indicator disc 91 will be rocked and the link 49 will rock the anchor plate 20 and thereby vary the It will be also observed that by reason of the indicator and the manually operable element being in close proximity to each other and on the side of the main frame, the operator will have no discomfort in adjusting the springs and in observing the amount of adjustment.

In Figure 8, I have disclosed a modified construction wherein the dial 91 is located wholly within the main frame A. In this form the closure plate 29 of the side wall 9 is provided with an inwardly depressed portion 50 which includes an arcuate and inwardly inclined wall BI and an upwardly inclined bottom wall 52 which overlies the scale 99 on said dial. The bottom wall 52 is provided with a view opening 59 which registers with the scale, and this opening is covered by a transparent plate ll attached to said bottom portion.

The bevelled peripheral scale portion is readily viewable from a point above and outwardly beyond the side wall, and the location of the knob 42 below the dial as shown in Figures 1 and 6 enables the operator to adjust the spring tension without interfering with continued observation of the dial.

It is of course to be understood that the details of structure and arrangement of parts may be variously changed and modified without departing from the spirit and scope of my invention.

I claim:

1. In a typewriting machine, the combination with a main frame including a wall. of a plurality of type actions supported within said frame, an anchor plate pivotally mounted within said frame, springs respectively connecting the type actions and the anchor plate, an indicator 'dial rotatably supported within the frame and .said wall, and operating connections between the dial, the element, and the anchor plate for effectlng conjoint movements thereof.

2. In a typewriting machine, the combination with a main frame including a wall, of .a pinrality of type actions supported within said frame, an anchor plate pivotally mounted within said frame, springs respectively connecting the type actions and the anchor plate, an indicator dial rotatably supported within the frame and projecting outwardly through said wall, the dial comprising a disc having a scale located thereon, a pointer fixed to the wall for cooperation with said scale, a manually operable element rotatably supported within the frame and projecting outwardly through said wall, and operating connections between the dial, the element, and the anchor plate for effecting conjoint movements thereof.

3. In a typewriting machine, the combination with a main frame including a wall, of a plurality of type actions supported within said frame, an anchor plate pivotally mounted within said frame, springs respectively connecting the type actions and the anchor plate, an indicator dial rotatably supported within the frame and projecting outwardly through said wallfa manually operable element rotatably supported within the frame and projecting outwardly through said wall, operating connections between the dial and the element, and a link pivotally connected at one end to the anchor plate and having its other end pivotally connected eccentrically to said dial.

4. In a typewriting machine, the combination with a main frame including a wall, of a plurality of type actions supported within said .frame, an anchor plate pivotally mounted within said frame, springs respectively connecting the type actions and the anchor plate, an indicator dial rotatably supported within the frame and projecting outwardly through said wall, the dial comprising a disc having a scale thereon, a pointer fixed to said wall for cooperation with said scale, a manually operable element rotatably supported within the frame and projecting outwardly through said wall, operating connections between the disc and the element, and

a link pivotally connected at one end to the anchor plate and having its other end pivotally connected eccentrically to said disc.

5. In a typewriting machine, the combination with a main frame including a wall, of a plurality of type actions supported within said frame, an anchor plate pivotally mounted with in said frame, springs respectively connecting the type actions and the anchor plate, an indicator dial rotatably supported within the frame and projecting outwardly through said wall, a manually operable element rotatably supported within the frame and projecting outwardly through said wall, operating connections between the dial, the element, and the anchor plate for effecting conjoint movements thereof, and stop means for limiting the rotary movement of said dial.

6. In a typewriting machine, the combination with a main frame including a wall; of a plurality of type actions supported within said frame; an anchor plate pivotally mounted within said frame; springs respectively connecting the type actions and the anchor plate; and mechanism operatively connected to said anchor plate and including a vertical shaft rotatably supported within the frame adjacent said wall, an indicator dial fixed to said shaft and projecting outwardly through said wall, a worm wheel fixed to said shaft, and a manually operable and horizontally disposed worm shaft rotatably supported within the frame and engageable with said worm wheel, said worm shaft projecting outwardly through said wall.

7. In a typewriting machine, the combination with a main frame including a wall, of a plurality of type actions supported within said frame, an anchor plate pivotally mounted within said frame, springs respectively connecting the type actions and the anchor plate, a vertical shaft rotatably supported within the frame adjacent said wall, an indicator dial fixed to said shaft and projecting outwardly through said wall, a worm wheel fixed to said shaft, a manually operable and horizontally disposed worm shaft rotatably supported within the frame and engageable with said worm wheel, said worm shaft projecting outwardly through said wall, and a link pivotally connected at one end to the anchor plate and having its other end pivoted eccentrically to said dial.

8. In a typewriting machine, the combination with a main frame including a side wall having an opening, of type actions supported within said frame; an anchor movably mounted within said'frame; springs connecting the type actions to the anchor; an indicator dial having a bevelled peripheral scale and being rotatably mounted within said frame with a portion of said scale being associated with said opening in a manner to be observable from a point above and outwardly beyond said side wall; a manually operable element; and operating connections between the dial, the element, and the anchor for effecting conjoint movements thereof.

9. In a typewriting machine, the combination with a main frame including a side wall having an opening; of type actions supported withinsaid frame; an anchor movably mounted within said frame; springs connecting the type actions to the anchor; an indicator dial having a bevelled peripheral scale and being rotatably mounted within said frame with a portion of said scale being associated with said opening in a manner to be observable from a point above and outwardly beyond said side wall; a manually operable element supported on said frame and projecting through said side wall at a point below said opening; and operating connections between the dial, the element, and the anchor for effecting conjoint movements thereof.

10. In a typewriting machine, the combination with a main frame including a side wall having an opening, of type actions supported within said frame; an anchor movably mounted within said frame; springs connecting the type actions to the anchor; an indicator dial rotatably mounted within said frame and having a bevelled peripheral scale inside of said side wall with a portion of said scale viewable through said opening from a point above and outwardly beyond said side wall; a manually operable element; and operating connections between the dial, the element and anchor for effecting conjoint movements thereof.

11. In a typewriting machine, a frame having a wall; type actions mounted within the frame; an anchor device movably supported on the frame; springs connecting the type actions with the anchor device, movement of the anchor device being effective to vary the tension of the springs; means for moving the anchor device; and a rotatable indicator dial connected to said anchor device and having a bevelled peripheral edge portion provided with scale markings, said frame wall being formed with an inwardly depressed portion having an inclined wall portion overlying the bevelled edge portion of the indicator dial, the inclined wall portion being provided with an opening through which the dial may be observed from outside the frame.

12. In a typewriting machine, a frame having a wall; type actions mounted within the frame; an anchor device movably supported on the frame; springs connecting the type actions with the anchor device, movement of the anchor device being effective to vary the tension of the springs; means for moving the anchor device; a rotatable indicator dial connected to said anchor device and having a bevelled peripheral edge portion provided with scale markings, said frame wall being formed with an inwardly depressed portion having an inclined wall portion overlying the bevelled edge portion of the indicator dial, the inclined wall portion being provided with an opening throughwhich the dial may be observed from outside the frame; and a transparent closure for said opening.

LEWIS C. MYERS. 

